Fuse block



2 Sheets-Sheet 1 March 17, 1925.

H. J. CRABBS FUSE BLOCK Filed June 10, 1922 INVENTOR He rberi John Cmbbs.

ATTbRNEY wn'uessss:

March 17, 1925. 1,529,773

H. J. CRABBS FUSE BLOCK Filed June 10. 1922 2 Sheets-Sheet 2 Fig. 2.

i b5a Fig.4.

wnuzssss; INVENTOR fl/M 15 Herberw John Crabbs.

' I I BY ATTORNEY Patented Mar. 17, 1925.

HERBERT J. CRAB BS, OF PITTSBURGH PENNSYLVANIA, ASSIGNOR- TO WESTING- HOUSE ELECTRIC do MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- VANIA.

w FUSE BLOCK.

Application filed June 10, 1922. Serial No. 567,319.

To all whom it may concern: I

Be it known that 'I, HERBERT JOHN Gimme, a citizen of the United States, and

a resident Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Fuse Blocks, of which the following is a specification.

My invention relates to fuse blocks and particularly to blocks for supportin expulsion fuses such as are used in hig potential circuits and mounted outdoors on poles.

One object of -my invention is to provide a simple block for supporting expulsion fuses that may be attached to insulators of .the pin type.

.A further object of my invention is to provide a fuse block of simple and relatively inexpensive construction. that may be readily secured to pin type insulators with a minimum of manipulation.

A further object of'my'inventionis to provide a relatively elastic clamping device whereby the fuse block may be tightly secured to the insulator in such manner that it will not become loosened by constant whipping of the conductors attached to the block.

These and other objects, that will be made so apparent throughout the further descrip tion of my'invention, are attained by means of the fuse blocks hereinafter described and illustrated in the accompanying drawings, wherein:

Figure 1 is an elevational view of an ex pulsion fuse structure mounted upon the improved form of fuse block;

Fig. 2 is an elevational view of a bracket constituting a part of the block, and

Figs. -3 and 4 are plan and side views, respectively, of the bracket shown in Fig. 2.

Referring to the drawings, the apparatus includes a pairof pin type insulators 5 which are of substantially standard con- 5 struction and are mounted upon. pins or bolts 6 that are secured to cross arms 7 that may bemounted upon a pole or support in the usual-manner.- The insulator is provided with a circumferential groove 8 dis- 0 posed between an annular bead 9 and an apron 10. A transverse groove 11 extends aer oss the top of the insulator and com: municates with the groove 8.

The fuse block comprises a bgacket 12 5 having a flat disc likebase portion 13 that of Pittsburgh, in the county. of

is adapted to rest upon the flat surface 14' on the end of the insulator. The bracket is preferably made of malleable iron or metal having ductile characteristics and is provided with a web 15-that terminates 1h tongues 15 which extend into the groove 11 and across the circumferential groove 8, as indicated in Fig. 1.

A flexible clamp ring 16, havin its ends provided with integral eyelets 1?, is disposed in the annular groove and embraces the ends of the. tongues 15 The ring is normally of greater diameter than the head 9 so that it may be slipped thereover when the ring is being, assembled upon the bracket.

The ends ofthe ring 16 are drawn toward one another by means of a threaded bolt '18 and a threaded nut 19 mounted thereon. Tightening of the bolt draws the annular ring 16 into engagement with the inclined under surface of the bead 9 and, consequently, tends to draw the bracket securely into engagement with the flat face 14 of the insulator. l

The web 15 and the tongues 15 lying 80 within the groove 11 prevent any tendency of the bracket to rotate about the axis of the groove 8. Therefore, when the brackets are secured to their respective insulators, their relative position will be permanently maintained. As indicated in the drawings, the bracket is provided with a perforation 21 through whieh a bolt 22 extends for securing a fuse clamp 23 there 0. The clamp 23 comprises a flat metal plate having a pair of U-bolts 24 which surround the fuse cartridge 25 and constitute a clamp for supporting it in any desired position. The fuse cartridge may be of any standard construction.

The bracket 12 is further provided with an opening 26 through whichthe end of a conductor 27 is looped, as indicated in Fig.

.1, the purpose, being to provide an anchor for-the conductor at a point substantial-1y coincident with the axis. of theinsulator so that the conductor oanexert no strains tending to relatively dis lace the insulator or the bracket. As in icated, the conductor is tiedto the bracket and the free, end is then connected to the terminal 28 of the fuse cartridge.

It will be apparent that the fuse car- 'tridges constituting an expulsion fuse may be adjusted at any angle with respectto one no another and that the cartridges may be adjuste'd longitudinally of the clamp 23 so supporting one embodiment of my invention,

that the distance between the ends of the fuses may be varied. As indicated, the fuses are disposed at .a slight angle with respect to one another and, when a fuse is burned, the resultant streams of gases discharged from the cartridges pass one another and tend to blow away the arc.

I have shown the bracket as employed for expulsion fuse cartridges, but it is apparent that the bracket may be designed for supporting various electrical devices, such as switches, bus bars and other types of fuses.

While I have described and illustrated but it will be apparent to those skilled in the art that various changes, modifications, substitutions, additions and omissions may be made therein without departing from the spirit and scope of my invention, as setforth in the appended claims.

I claim as my invention:

1. In a fuse block, the combination with an insulating support having a circumferential groove and a transverse groove in the end of the support and communicating with the first groove on opposite sides of the support, of a bracket for the fuse engaging the end of the support and having oppositely disposed tongues extending into the opposite ends of the transverse groove and across the circumferential groove and an adjustable annular clamp member fitting within the circumferential groove and over the said tongues for clamping the bracket to'the support.

2. In a supporting block for an electrical device, the combination with an insulating support having a circumferential groove and support,

a transverse groove in the end of the sup port and communicating with the first groove on substantially opposite sides of the of a bracket for the said device engaging the end of the support and hav mg oppositely disposed tongues extending into the opposite ends of the transverse groove and across the circumferential groove and an adjustable annular clamp member fitting within the circumferential groove and over the said tongues for clamping the bracket to the support,

3. In a fuse block, the combination with an insulating support having a circumferential groove and radial grooves in the end of the support communicating with the first groove, of a bracket for the fuse engaging the end of the support and having tongues extending into the radial groove across the circumferential groove and an adjustable annular clamp member fitting within the groove and over the said tongues for clamping the bracket to the support.

4. In a supporting block for an electrical device, the combination with an insulating support having a circumferential bead at one end having notches therein, of a bracket for the device engaging the end of the support and provided with tongues extending into the said notches and beyond the bead and an adjustable annular clamp member normally of greater diameter than that of the bead and adjustable to a smaller diameter than that of the bead for engaging the tongues and clamping the bracket to the support.

5. In a supporting block for an electrical device, the combination with an insulating support having a circumferential beadat one end having notches therein, of a bracket for'the device engaging the end of the support and provided with tongues extending into the said notches and beyond the bead and an adjustable annular clamp member engaging the bead and extending over the said tongues for clamping the bracket/to the support.

" In testimony whereof, I have hereunto subscribed my name HERBERT J. CRABBS.

this first'day of June, 

